With congressional reporter Karoun Demirjian, we look at how Capitol Hill's investigations work, how the Democrats are trying to hone their oversight strategy and which lines of inquiry might have significant consequences for the president.

What we learned from Michael Cohen's scathing testimony

Marc Fisher wraps up this week's hearings, plus a look at what it was like for reporters experiencing the public hearing in realtime.

Will Trump’s emergency survive legal and congressional challenges?

How will legal battles over President Trump's emergency play out in the courts? How will Democrats push back in Congress? Is there anything stopping Trump from starting to build the wall today? The Post's legal affairs correspondent Fred Barbash explains.

Trump to declare a national emergency and Barr is confirmed

Can Trump get funding for a border wall by declaring a national emergency? And can the new U.S. attorney general decide what happens to the Mueller report? Here's a refresher episode answering key questions surrounding Thursday's news moments.